The drill instructors at Parris Island will inform you quickly and with emphasis exactly why a recruit is not to use the pronoun "you" when adressing them.Ewe's are female sheep, and are the carriers of the syphyllis virus.
Also, in England during the 1440s, Parliament passed a law specifically forbidding shepherds (and witches) to be present at the birth of an infant, or to serve as "midwife" in some capacity.
From anecdotal evidence, it appears that many infants delivered by shepherds turned up ill, or dead (no mention about infants delivered by witches).
Some years ago, I asked a physician about this; he speculated that since some sexually-transmitted diseases originated with shepherds and sheep, these diseases might have been responsible for the sick or dead infants.
Of course, during the 15th century, no one connected the dots, disease with sick or dead children.....all they knew was that, if the "midwife" was a shepherd (or witch), there was a very good chance something might go wrong with the infant, and so it was best to keep shepherds (and witches) away from the birthing-bed just in case.
The drill instructors at Parris Island will inform you quickly and with emphasis exactly why a recruit is not to use the pronoun "you" when adressing them.